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Your Tumblr sidebar contains space for a single image by default. This image is your Tumblr avatar and usually consists of your own photo or your company's logo. You can add other images to the sidebar by editing the code of your Tumblr template. You might use your sidebar for posting brand material such as alternate logos or photos of your company headquarters. These images will appear visible on every page of your blog, and if you fix your sidebar in place, your readers will see them constantly as they scroll down the page.

1. Log in to Tumblr and open your company's blog in your browser.

2. Click the blog's "Customize" button to open your theme editor.

3. Click "HTML" to view your theme's code.

4. Press "Ctrl-F" to open your browser's Find feature, and search for code labeled "sidebar." For example, this code may read:

5. Type the following code within the "sidebar" block:

6. Replace "http://www.example.com/image.png" with the address of the image that you want to add.

7. Replace "200" with the width that you want the image to use, measured in pixels.

About the Author

Ryan Menezes is a professional writer and blogger. He has a Bachelor of Science in journalism from Boston University and has written for the American Civil Liberties Union, the marketing firm InSegment and the project management service Assembla. He is also a member of Mensa and the American Parliamentary Debate Association.